StructSaver
Save, manage and place Minecraft structures with ghost previews, rotation, mirroring and NBT support.
Screenshots
About this Mod
StructSaver
StructSaver is a Fabric mod for Minecraft 1.21.5 that allows you to save, manage and place structures directly in-game.
Whether you're building cities, redstone contraptions or decorative builds, StructSaver provides an easy way to create reusable structure templates with visual placement previews.
Features
Selection
- Select areas using a wooden hoe
- Two-click corner selection
- Optional single-block selection mode
- Colored selection outlines (8 presets)
- Multiplayer synchronization
- Ghost-block preview of selected structures
Structure Library
- Save structures with custom names
- JSON-based storage format
- Searchable structure library
- Creation date display
- Rename structures
- Delete structures with confirmation dialog
- Overwrite warning for existing structures
Placement
- Real-time ghost preview
- Green preview = valid placement
- Red preview = blocked placement
- Placement centered on the targeted block
- Rotation support
- Mirroring support
- Easy right-click placement
NBT Support
- Export structures as Minecraft
.nbtfiles - Import existing
.nbtstructures - Share structures between worlds and computers
Settings
- Open settings with F6
- Toggle area and single-block selection
- Change selection outline colors
- Mod Menu integration
Multiplayer Support
StructSaver is designed to work in multiplayer.
- Server-side structure storage
- Client-side rendering
- Network synchronization for save, load, rename, delete, preview and placement
Requirements
- Minecraft 1.21.5
- Fabric Loader
- Fabric API
- Java 25
Controls
| Key | Action |
|---|---|
| R | Rotate clockwise |
| T | Rotate counter-clockwise |
| F | Mirror X-axis |
| G | Mirror Z-axis |
| F6 | Open settings |
Notes
- Placement is restricted to Creative and Spectator mode.
- Supports Minecraft's standard NBT structure format.
Available Versions
How to Install StructSaver on Your Server
Order Server
Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (26.2).
Install Mod
Open the mod browser in the dashboard and search for "StructSaver". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.2
Server-side
✓ RequiredRecommended RAM
6 GB(min. 4 GB)Frequently Asked Questions
StructSaver server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (26.2). You can switch loaders with one click in the panel.
Is StructSaver compatible with fabric?
StructSaver officially supports fabric for Minecraft 26.2. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with StructSaver – how to optimize performance?
Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if StructSaver consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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